The man, who is in his 60s, had recently traveled out of state, but he also could have been exposed in the Greater Boston region which is at “high” risk for exposure, state officials said Friday.

West Nile virus is not contagious between people because humans are dead-end hosts, which means they don't pass on the virus. There is a median of about 2,200 cases of the virus in the U.S. every year, according to the Department of Health and Human Services.

Positive samples of West Nile virus in mosquitoes have been reported from north to south in Berkshire County, placing all but three towns at "moderate risk." The rates vary from